A complete protein is a type of protein that contains all nine essential amino acids required for human nutrition. These amino acids cannot be produced by our bodies and must be obtained through diet, therefore it's important to consume them regularly in order to maintain good health. Complete proteins are typically found in animal products such as meat, fish, eggs or dairy, while plant-based sources of protein often lack one or more essential amino acids and are referred to as incomplete proteins. However, by combining different types of vegetable protein throughout the day, it is possible to obtain all nine essential amino acids and create a complete protein intake.